US4432789A - Method of minimizing energy consumption when reducing iron oxide with reducing gases - Google Patents
Method of minimizing energy consumption when reducing iron oxide with reducing gases Download PDFInfo
- Publication number
- US4432789A US4432789A US06/460,499 US46049983A US4432789A US 4432789 A US4432789 A US 4432789A US 46049983 A US46049983 A US 46049983A US 4432789 A US4432789 A US 4432789A
- Authority
- US
- United States
- Prior art keywords
- heat
- shaft furnace
- gas
- wash
- reducing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
- C21B2100/28—Increasing the gas reduction potential of recycled exhaust gases by separation
- C21B2100/282—Increasing the gas reduction potential of recycled exhaust gases by separation of carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/66—Heat exchange
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
Definitions
- the present invention relates to a method and means for minimizing the energy consumption when reducing iron oxide with reducing gases which are at least partially re-circulated in the process and where the re-circulation gas is washed to remove the reaction product CO 2 in what is known as a CO 2 wash to enable it to be re-used.
- the heat supplied externally in the form of steam can be entirely or partially replaced, which greatly reduces the process costs.
- heat-exchangers are placed in the pipes leading the reducing gas from the furnace shaft and/or in the pipes leading the cooling gas from the sponge-iron cooler.
- the washing solution to be regenerated may be caused to pass one of such heat-exchangers directly.
- water vapour can be produced in said heat-exchangers and thereafter be used for regeneration.
- the invention also relates to a means or apparatus for performing the method described above, having heat-exchangers placed as indicated above.
- FIG. 1 is a principal diagram of a means or apparatus according to the invention.
- FIG. 2 shows an alternative embodiment of the equipment shown in FIG. 1.
- a conventional shaft furnace is designated 1.
- the shaft 1 has an outlet 2 for hot reduction gas at the top and an outlet 3 at the bottom for hot cooling gas from a sponge-iron cooler.
- Heat-exchangers 5, 6 have been arranged in the outlets 2 and 3.
- the reduction gas leaving the shaft 1 is cooled and thereafter caused to pass a washing solution in a CO 2 wash 7, the gas being introduced at point 9 in the bottom of the wash 7 and removed from the top 10.
- the washing liquid from the wash 7 is passed to a stripper 8 for regeneration, where it is continuously regenerated by means of heating.
- This heating may be achieved according to the invention by means of steam obtained by water being pumped through one or both the heat-exchangers 5, 6 mentioned above.
- the washing solution itself can be pumped directly through said heat-exchangers for regeneration.
- the energy conservation aimed at according to the invention is thus achieved in the illustrated embodiments by an arrangement of heat-exchangers or tube-coolers in the outlet pipe for hot reduction gas from the furnace shaft and/or in the outlet pipe for hot cooling gas from the sponge-iron cooler.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture Of Iron (AREA)
- Compounds Of Iron (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Description
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8201273 | 1982-03-02 | ||
SE8201273A SE448740B (en) | 1982-03-02 | 1982-03-02 | SET AND DEVICE FOR THE REGENERATION OF COW 712 LAUNDRY BY REDUCING IRON OXIDE WITH REDUCING GAS |
Publications (1)
Publication Number | Publication Date |
---|---|
US4432789A true US4432789A (en) | 1984-02-21 |
Family
ID=20346142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/460,499 Expired - Fee Related US4432789A (en) | 1982-03-02 | 1983-01-24 | Method of minimizing energy consumption when reducing iron oxide with reducing gases |
Country Status (15)
Country | Link |
---|---|
US (1) | US4432789A (en) |
JP (1) | JPS58153715A (en) |
AU (1) | AU9002782A (en) |
BE (1) | BE894676A (en) |
BR (1) | BR8206446A (en) |
DD (1) | DD203332A5 (en) |
DE (1) | DE3233836A1 (en) |
ES (1) | ES516493A0 (en) |
FI (1) | FI823476L (en) |
FR (1) | FR2530667A1 (en) |
GB (1) | GB2115837A (en) |
IT (1) | IT1152932B (en) |
NO (1) | NO823343L (en) |
SE (1) | SE448740B (en) |
ZA (1) | ZA827877B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104045057A (en) * | 2014-06-20 | 2014-09-17 | 北京神雾环境能源科技集团股份有限公司 | Process for directly producing sponge iron by catalytic partial oxidation of natural gas |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5110350A (en) * | 1983-05-16 | 1992-05-05 | Hylsa S.A. De C.V. | Method of reducing iron ore |
AT510618B1 (en) * | 2010-11-04 | 2013-02-15 | Siemens Vai Metals Tech Gmbh | PROCESS FOR REMOVING CO2 FROM EXHAUST GASES |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2977216A (en) * | 1958-12-31 | 1961-03-28 | Texaco Development Corp | Ore reduction process |
US3909244A (en) * | 1971-01-27 | 1975-09-30 | Metallgesellschaft Ag | Process for directly reducing iron ores in the solid state under pressure |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5230210A (en) * | 1975-09-03 | 1977-03-07 | Nippon Steel Corp | Method of manufacturing reduced iron |
DE2542595C2 (en) * | 1975-09-24 | 1986-04-30 | Holland, Gerhard, Dr.rer.pol., 6000 Frankfurt | Process for separating metal vapors from gaseous mixtures |
DE2805840C2 (en) * | 1977-02-14 | 1986-01-02 | American Hydrotherm Corp., New York, N.Y. | Process for waste heat recovery |
US4160810A (en) * | 1978-03-07 | 1979-07-10 | Benfield Corporation | Removal of acid gases from hot gas mixtures |
AT360569B (en) * | 1979-05-18 | 1981-01-26 | Voest Alpine Ag | METHOD FOR RECYCLING THE FLUE GAS HEAT IN THE CONTINUOUS DIRECT REDUCTION OF IRON ORE AND PLANT THEREFOR |
-
1982
- 1982-03-02 SE SE8201273A patent/SE448740B/en not_active IP Right Cessation
- 1982-09-11 DE DE19823233836 patent/DE3233836A1/en not_active Withdrawn
- 1982-10-04 NO NO823343A patent/NO823343L/en unknown
- 1982-10-05 GB GB08228342A patent/GB2115837A/en not_active Withdrawn
- 1982-10-12 FI FI823476A patent/FI823476L/en not_active Application Discontinuation
- 1982-10-12 BE BE0/209219A patent/BE894676A/en not_active IP Right Cessation
- 1982-10-14 ES ES516493A patent/ES516493A0/en active Granted
- 1982-10-21 DD DD82244194A patent/DD203332A5/en unknown
- 1982-10-21 IT IT23850/82A patent/IT1152932B/en active
- 1982-10-26 FR FR8217898A patent/FR2530667A1/en active Pending
- 1982-10-26 JP JP57186890A patent/JPS58153715A/en active Pending
- 1982-10-28 ZA ZA827877A patent/ZA827877B/en unknown
- 1982-10-29 AU AU90027/82A patent/AU9002782A/en not_active Abandoned
- 1982-11-08 BR BR8206446A patent/BR8206446A/en unknown
-
1983
- 1983-01-24 US US06/460,499 patent/US4432789A/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2977216A (en) * | 1958-12-31 | 1961-03-28 | Texaco Development Corp | Ore reduction process |
US3909244A (en) * | 1971-01-27 | 1975-09-30 | Metallgesellschaft Ag | Process for directly reducing iron ores in the solid state under pressure |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104045057A (en) * | 2014-06-20 | 2014-09-17 | 北京神雾环境能源科技集团股份有限公司 | Process for directly producing sponge iron by catalytic partial oxidation of natural gas |
CN104045057B (en) * | 2014-06-20 | 2016-04-20 | 北京神雾环境能源科技集团股份有限公司 | A kind of Sweet natural gas catalyzing part oxidation produces the technique of direct sponge iron |
Also Published As
Publication number | Publication date |
---|---|
DE3233836A1 (en) | 1983-09-22 |
GB2115837A (en) | 1983-09-14 |
BE894676A (en) | 1983-01-31 |
ES8400491A1 (en) | 1983-11-16 |
IT8223850A0 (en) | 1982-10-21 |
DD203332A5 (en) | 1983-10-19 |
JPS58153715A (en) | 1983-09-12 |
ZA827877B (en) | 1984-06-27 |
ES516493A0 (en) | 1983-11-16 |
FI823476L (en) | 1983-09-03 |
FI823476A0 (en) | 1982-10-12 |
SE448740B (en) | 1987-03-16 |
BR8206446A (en) | 1984-05-08 |
AU9002782A (en) | 1983-09-08 |
IT1152932B (en) | 1987-01-14 |
FR2530667A1 (en) | 1984-01-27 |
SE8201273L (en) | 1983-09-03 |
NO823343L (en) | 1983-09-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SKF STEEL ENGINERRING AB., P.O. BOX 202, S-813 00 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:MATHISSON, GORAN;SANTEN, SVEN;REEL/FRAME:004102/0966 Effective date: 19830207 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, PL 97-247 (ORIGINAL EVENT CODE: M173); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, PL 97-247 (ORIGINAL EVENT CODE: M174); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
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FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19960221 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |